diff --git a/Gemfile.lock b/Gemfile.lock
index 179026d..e7dfb04 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,6 +3,7 @@ PATH
   specs:
     omniauth-identity (3.1.1)
       bcrypt (~> 3.1)
+      mutex_m (~> 0.3, >= 0.3.0)
       omniauth (>= 1)
       version_gem (~> 1.1, >= 1.1.4)
 
@@ -41,7 +42,7 @@ GEM
     base64 (0.2.0)
     bcrypt (3.1.20)
     benchmark (0.4.0)
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     bson (5.0.2)
     byebug (11.1.3)
     coderay (1.1.3)
@@ -55,6 +56,7 @@ GEM
       httpclient (~> 2.8)
       mime-types (>= 1.15)
       multi_json (~> 1.7)
+    date (3.4.1)
     diff-lcs (1.5.1)
     diffy (3.4.3)
     docile (1.4.1)
@@ -67,7 +69,7 @@ GEM
       logger
       zeitwerk (~> 2.6)
     dry-inflector (1.1.0)
-    dry-initializer (3.1.1)
+    dry-initializer (3.2.0)
     dry-logic (1.5.0)
       concurrent-ruby (~> 1.0)
       dry-core (~> 1.0, < 2)
@@ -87,25 +89,27 @@ GEM
       dry-inflector (~> 1.0)
       dry-logic (~> 1.4)
       zeitwerk (~> 2.6)
-    ffi (1.17.0-aarch64-linux-gnu)
-    ffi (1.17.0-aarch64-linux-musl)
-    ffi (1.17.0-arm-linux-gnu)
-    ffi (1.17.0-arm-linux-musl)
-    ffi (1.17.0-arm64-darwin)
-    ffi (1.17.0-x86-linux-gnu)
-    ffi (1.17.0-x86-linux-musl)
-    ffi (1.17.0-x86_64-darwin)
-    ffi (1.17.0-x86_64-linux-gnu)
-    ffi (1.17.0-x86_64-linux-musl)
+    ffi (1.17.1-aarch64-linux-gnu)
+    ffi (1.17.1-aarch64-linux-musl)
+    ffi (1.17.1-arm-linux-gnu)
+    ffi (1.17.1-arm-linux-musl)
+    ffi (1.17.1-arm64-darwin)
+    ffi (1.17.1-x86-linux-gnu)
+    ffi (1.17.1-x86-linux-musl)
+    ffi (1.17.1-x86_64-darwin)
+    ffi (1.17.1-x86_64-linux-gnu)
+    ffi (1.17.1-x86_64-linux-musl)
     formatador (1.1.0)
     github-markup (5.0.1)
     growl (1.0.3)
-    guard (2.19.0)
+    guard (2.19.1)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
+      logger (~> 1.6)
       lumberjack (>= 1.0.12, < 2.0)
       nenv (~> 0.1)
       notiffany (~> 0.0)
+      ostruct (~> 0.6)
       pry (>= 0.13.0)
       shellany (~> 0.0)
       thor (>= 0.18.1)
@@ -179,10 +183,13 @@ GEM
     parser (3.3.6.0)
       ast (~> 2.4.1)
       racc
-    power_assert (2.0.4)
-    pry (0.15.0)
+    power_assert (2.0.5)
+    pry (0.15.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    psych (5.2.2)
+      date
+      stringio
     racc (1.8.1)
     rack (2.2.10)
     rack-protection (3.2.0)
@@ -195,13 +202,15 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
+    rdoc (6.10.0)
+      psych (>= 4.0.0)
     redcarpet (3.6.0)
     reek (6.3.0)
       dry-schema (~> 1.13.0)
       parser (~> 3.3.0)
       rainbow (>= 2.0, < 4.0)
       rexml (~> 3.1)
-    regexp_parser (2.9.3)
+    regexp_parser (2.10.0)
     rethinkdb (2.4.0.0)
     rexml (3.4.0)
     rspec (3.13.0)
@@ -262,7 +271,7 @@ GEM
       rubocop-thread_safety (~> 0.5, >= 0.5.1)
       standard-rubocop-lts (~> 1.0, >= 1.0.7)
       version_gem (>= 1.1.3, < 3)
-    rubocop-sequel (0.3.7)
+    rubocop-sequel (0.3.8)
       rubocop (~> 1.0)
     rubocop-shopify (2.15.1)
       rubocop (~> 1.51)
@@ -270,7 +279,7 @@ GEM
       rubocop (>= 1.48.1)
     ruby-progressbar (1.13.0)
     securerandom (0.4.1)
-    sequel (5.87.0)
+    sequel (5.88.0)
       bigdecimal
     shellany (0.0.1)
     simplecov (0.22.0)
@@ -289,16 +298,16 @@ GEM
     simplecov-rcov (0.3.7)
       simplecov (>= 0.4.1)
     simplecov_json_formatter (0.1.4)
-    sqlite3 (2.4.1-aarch64-linux-gnu)
-    sqlite3 (2.4.1-aarch64-linux-musl)
-    sqlite3 (2.4.1-arm-linux-gnu)
-    sqlite3 (2.4.1-arm-linux-musl)
-    sqlite3 (2.4.1-arm64-darwin)
-    sqlite3 (2.4.1-x86-linux-gnu)
-    sqlite3 (2.4.1-x86-linux-musl)
-    sqlite3 (2.4.1-x86_64-darwin)
-    sqlite3 (2.4.1-x86_64-linux-gnu)
-    sqlite3 (2.4.1-x86_64-linux-musl)
+    sqlite3 (2.5.0-aarch64-linux-gnu)
+    sqlite3 (2.5.0-aarch64-linux-musl)
+    sqlite3 (2.5.0-arm-linux-gnu)
+    sqlite3 (2.5.0-arm-linux-musl)
+    sqlite3 (2.5.0-arm64-darwin)
+    sqlite3 (2.5.0-x86-linux-gnu)
+    sqlite3 (2.5.0-x86-linux-musl)
+    sqlite3 (2.5.0-x86_64-darwin)
+    sqlite3 (2.5.0-x86_64-linux-gnu)
+    sqlite3 (2.5.0-x86_64-linux-musl)
     standard (1.43.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
@@ -373,6 +382,7 @@ DEPENDENCIES
   rack-test (~> 1)
   rake (~> 13)
   rb-fsevent
+  rdoc (>= 5.1)
   redcarpet
   reek
   rspec (~> 3)
diff --git a/omniauth-identity.gemspec b/omniauth-identity.gemspec
index 57491a8..1fc41c3 100644
--- a/omniauth-identity.gemspec
+++ b/omniauth-identity.gemspec
@@ -47,6 +47,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency("bcrypt", "~> 3.1")
+  spec.add_dependency("mutex_m", "~> 0.3", ">= 0.3.0")
   spec.add_dependency("omniauth", ">= 1")
   spec.add_dependency("version_gem", "~> 1.1", ">= 1.1.4")
 
@@ -61,4 +62,7 @@ Gem::Specification.new do |spec|
 
   ### ORMs
   spec.add_development_dependency("sqlite3", ">= 1")
+
+  ### Documentation
+  spec.add_development_dependency("rdoc", ">= 5.1")
 end